Hi Jim, Yes, I didn't know either but the the systems have been in use for at least a year now. They were first only used for the newer "park flyer" type aircraft with fairly limited range. They are now approved for use with conventional RC aircraft from the little ones all the way up to the huge 40% scale planes. I'm not real well versed in the technology but I do understand it's a variation of the spread spectrum technique. The first system that was out rapidly switches back and forth between a couple of unused frequencies. The newer Futaba system rapidly switches among many different frequencies. The advantage for RC pilots is that there are no frequency conflicts. There is no need for channels and one pilot cannot accidently "shoot down" another's aircraft. I don't know the impact they have on S band, if any. They might contribute to the overall problem with the ever increasing noise floor on the band. 73, Michael, W4HIJ Jim Jerzycke wrote:
Just stumbled across this in an ad for Tower Hobbies: http://www.towerhobbies.com/rcwnews/070210-futk6900.html I had no idea that the 2.4 GHz band was authorized for R/C use. 73, Jim KQ6EA
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